Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Terminals Of Ecu

TERMINALS OF ECU

DCM (TELEMATICS TRANSCEIVER)

*a

to Telephone Antenna (Sub)

*b

to GPS Antenna

*c

to Telephone Antenna (Main)

-

-

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J168-1 (USB-)

-

USB communication line

-

-

J168-2 (USB+)

-

USB communication line

-

-

J168-3 (USBS) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 V

J157-31 (USBG) - Body ground

G - Body ground

DCM (Telematics Transceiver) power supply ground signal

Always

Below 1 V

J157-17 (VOT+) - J157-20 (E)

P - W-B

Sent voice signal

Vehicle occupant speaking to operator

A waveform synchronized with the voice signals received voice is output

J157-15 (USBV) - J157-20 (E)

L - W-B

DCM (Telematics Transceiver) power supply signal

Engine switch off

Below 1 V

Engine switch on (IG)

4.5 to 5.25 V

J157-33 (VOT-) - J157-20 (E)

SB - W-B

Sent voice signal

Vehicle occupant speaking to operator

A waveform synchronized with the received voice is output

J157-34 (VOR-) - J157-20 (E)

LG - W-B

Receive voice signal

Operator speaking to vehicle occupant

A waveform synchronized with the sent voice is output

J157-18 (VOR+) - J157-20 (E)

BR - W-B

Receive voice signal

Operator speaking to vehicle occupant

A waveform synchronized with the sent voice is output

RADIO RECEIVER ASSEMBLY

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J149-15 (VOT+) - J148-1 (GND1)

BR - W-B

Sent voice signal

Destination assist service in use and vehicle occupant speaking to operator

A waveform synchronized with the sent voice is output

J149-10 (USBV) - J148-1 (GND1)

L - W-B

DCM (Telematics transceiver) power supply

Engine switch on (ACC)

4.75 to 5.25 V

Engine switch off

A waveform synchronized with sound is output

J149-11 (USBG) - J148-1 (GND1)

G - W-B

DCM (Telematics Transceiver) power supply ground signal

Always

Below 1 V

J149-12 (SGND) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 V

J149-13 (VOR+) - J148-1 (GND1)

P - W-B

Receive voice signal

Destination assist service in use and operator speaking to vehicle occupant

A waveform synchronized with the received voice is output

J149-14 (VOR-) - J148-1 (GND1)

SB - W-B

Receive voice signal

Destination assist service in use and operator speaking to vehicle occupant

A waveform synchronized with the received voice is output

J149-16 (VOT-) - J148-1 (GND1)

LG - W-B

Sent voice signal

Destination assist service in use and vehicle occupant speaking to operator

A waveform synchronized with the sent voice is output

NAVIGATION ECU (w/ Navigation System)

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J164-2 (USB-)

-

USB communication line

-

-

J164-1 (USB+)

-

USB communication line

-

-

J164-3 (USBS) - Body ground

Shielded - Body ground

Shield ground

Always

Below 1 V

    Problem Symptoms Table
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    Confirm Cellular Phone Functionality
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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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